debt bondage noun

A system (often amounting to virtual slavery) whereby a person is obliged to work for a moneylender in an attempt to pay off debt

debt overhang noun (economics)

A situation which arises when a government or company faces such a level of debt that it is not expected to be able to repay it in the future, resulting in decreased spending on infrastructure and lower levels of investment

debt swap noun

A financial transaction in which debt liabilities are exchanged with the aim of profiting from differing rates

debt of honour noun

A debt not recognized by law, but binding in honour (esp a gambling or betting debt)

debt of nature noun

Death

bad debt

A debt of which there is no prospect of payment

floating debt

Miscellaneous public debt, like exchequer and treasury bills, as opposed to funded debt, that which has been converted into perpetual annuities like consols in Britain

in someone's debt

Under an obligation (not necessarily pecuniary) to someone

national debt see under nation¹